## Quickstart
If you want to build GraphHopper from source look at the [Developers page](../core/quickstart-from-source.md).
The following steps are simpler and only need the JRE, a jar file and an OSM file.
1. Install the latest JRE and get the zip of the [GraphHopper Web Service](https://github.com/graphhopper/graphhopper/blob/master/README.md#get-started)
2. Unzip it and copy an OSM file into the created directory. For example [berlin-latest.osm.pbf](http://download.geofabrik.de/europe/germany/berlin.html)
3. Start GraphHopper Maps via: `java -jar *.jar jetty.resourcebase=webapp config=config-example.properties datareader.file=berlin-latest.osm.pbf`
4. After you see 'Started server at HTTP 8989' go to [http://localhost:8989/](http://localhost:8989/) and you should see a map of Berlin. You should be able to click on the map and a route appears.
See [here](./../core/elevation.md) how to easily enable elevation data. To see how GraphHopper is configured for production usage, see the [deployment guide](./../core/deploy.md).
## Troubleshooting
* Make sure JRE8 is installed. If not get Java [here](http://java.com).
* Regarding step 2:
* The folder where you execute the java command should contain the following files: berlin-latest.osm.pbf, config-example.properties and `graphhopper-web-[version].jar`
* The first time you execute this it'll take ~30 seconds (for Berlin), further starts will only load the graph and should be nearly instantaneous. You should see log statements but no exceptions and the last entry should be something like: Started server at HTTP 8989
* Or [contact us](../index.md#contact)

Sometimes it works perfectly, sometimes I only get {"message": "Not found"}I have no clue why this could be.

If you use the unzipped release this should work as described (make sure you go into the create directory and there is a directory called 'webapp'). If you work with the clone repo then you can try what @boldtrn suggested.